I have a several PNG files then i convert into PDF'S files so i want to remove some selected part of files.How can i perform it.? I have adobe acrobat 11.
Use the Redaction tool under Tools - Protection.
after printing the redaction document area shows black that's big problem it will consume maximum printer ink.How can overcome it?
Before applying the redaction right-click it and select Properties and you'll be able to change the fill color to something else.
Edit: And if you also tick the "Make Properties Default" box in that window any new redactions you create afterwards will have this fill color by default.